ios-kernel-patch/apply_patchfile.c

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#include <data/common.h>
#include <data/binary.h>
#include <assert.h>
int main(int argc, char **argv) {
struct binary binary;
b_init(&binary);
mode_t mode;
prange_t kernel = load_file(argv[1], true, &mode);
b_prange_load_macho(&binary, kernel, argv[1]);
int patchfd = open(argv[2], O_RDONLY);
if(patchfd == -1) {
edie("could not open patchfd");
}
while(1) {
uint32_t name_len;
ssize_t result = read(patchfd, &name_len, sizeof(name_len));
if(result == 0) break;
assert(result == sizeof(name_len));
assert(name_len < 128);
char *name = malloc(name_len + 1);
assert(read(patchfd, name, name_len) == (ssize_t) name_len);
name[name_len] = 0;
addr_t addr;
assert(read(patchfd, &addr, sizeof(addr)) == sizeof(addr));
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uint32_t size;
assert(read(patchfd, &size, sizeof(size)) == sizeof(size));
assert(size < 0x1000000);
void *stuff = malloc(size);
assert(read(patchfd, stuff, size) == (ssize_t) size);
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if(addr != 0) {
printf("%s\n", name);
memcpy((char *) kernel.start + range_to_off_range((range_t) {&binary, addr, size}).start, stuff, size);
}
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free(name);
free(stuff);
}
store_file(kernel, argv[3], mode);
return 0;
}